%0 Journal Article
%T Evaluation of ULF electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm by wavelet transform analysis
%A P. Han
%A K. Hattori
%A Q. Huang
%A T. Hirano
%J Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD)
%D 2011
%I Copernicus Publications
%R 10.5194/nhess-11-965-2011
%X There have been many reports on ULF electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm. In this study, seismo-magnetic anomalies are presented by examining energy variations of signatures at the periods around 100 s. Geomagnetic data observed at three stations in Izu Peninsula from 1 January 2000 to 30 April 2001 have been analyzed and wavelet transform has been performed. In order to indentify anomalous changes from ionosphere disturbances, Kakioka station has been chosen as a reference station, and the similar data analysis has been performed. The results suggest that the unusual energy enhancement of the Z component, which only appears in Izu Peninsula from late June until early November 2000, might possibly be one of electromagnetic phenomena associated with the 2000 Izu Islands earthquake swarm.
%U http://www.nat-hazards-earth-syst-sci.net/11/965/2011/nhess-11-965-2011.pdf